CN216744314U - Novel combustion system of biomass power plant - Google Patents
Novel combustion system of biomass power plant Download PDFInfo
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- CN216744314U CN216744314U CN202122963120.XU CN202122963120U CN216744314U CN 216744314 U CN216744314 U CN 216744314U CN 202122963120 U CN202122963120 U CN 202122963120U CN 216744314 U CN216744314 U CN 216744314U
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Abstract
The utility model provides a novel biomass power plant's combustion system, novel biomass power plant's combustion system includes: boiler, be used for boiler feed inlet device and be used for the boiler device of giving vent to anger, feed inlet device includes: the feed belt, locate the hopper of feed belt below, locate hopper discharge end first auger delivery ware, locate the dry separation all-in-one of first auger delivery ware discharge end, give vent to anger the centrifugal separator of end intercommunication, with the dust remover of centrifugal separator discharge end intercommunication, thin material hopper and second auger delivery ware with dry separation all-in-one, the discharge end of second auger delivery ware is linked together with the furnace of boiler, the play dirt end of the discharge end of centrifugal separator and dust remover connects to thin material hopper, the feed end of second auger delivery ware and the discharge end and the thin material hopper of dry separation all-in-one communicate mutually. The effects of reducing the water content of the fuel, improving the combustion efficiency of the boiler and reducing the fan can be achieved.
Description
Technical Field
The utility model relates to a combustion system especially relates to a novel biomass power plant's combustion system.
Background
The biomass power plant produces steam through heat obtained by burning biomass for power generation, the biomass fuel is conveyed to the screw feeder through a belt, the screw feeder conveys biomass fuel particles to the hearth, and the blanking port is provided with seeding air and sealing air, so that the drying and sealing effects on the fuel are achieved. The primary air is boosted by the fan and then heated by the air preheater and then divided into two paths, one path is an ignition air channel, and the other path is primary hot air at the bottom of the furnace, so that the fluidized combustion effect on the fuel in the furnace is achieved. The secondary air is boosted by the fan and heated by the air preheater and then sent to the hearth to participate in combustion. Flue gas generated by the hearth sequentially passes through the cyclone separator, the low-temperature superheater, the high-temperature superheater, the air preheater, the dust remover, the induced draft fan, the desulfurization device and the denitration device, and then is discharged into the atmosphere through a chimney.
The limitations of the prior art are as follows:
the water content of the biomass fuel is high, so that the biomass fuel is not fully combusted in a hearth, and the boiler efficiency is low;
the biomass fuel has high dust content, sparks exist at high temperature, and the SCR catalyst is harmful, so the SCR needs to be arranged at a low-temperature section and is generally arranged at a position behind a dust remover, a relatively expensive low-temperature catalyst needs to be adopted, the flue gas temperature is low, the reaction temperature can be reached after steam heating is adopted, and the unit efficiency is further reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned not enough that present combustion system exists, the utility model provides a novel biomass power plant's combustion system can reach and reduce fuel moisture content, improve boiler combustion efficiency, reduce the fan effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel combustion system of a biomass power plant comprises: boiler, be used for boiler feed inlet device and be used for the boiler device of giving vent to anger, feed inlet device includes: the feed belt, locate the hopper of feed belt below, locate hopper discharge end first auger delivery ware, locate the dry separation all-in-one of first auger delivery ware discharge end, give vent to anger the centrifugal separator of end intercommunication, with the dust remover of centrifugal separator discharge end intercommunication, thin material hopper and second auger delivery ware with dry separation all-in-one, the discharge end of second auger delivery ware is linked together with the furnace of boiler, the play dirt end of the discharge end of centrifugal separator and dust remover connects to thin material hopper, the feed end of second auger delivery ware and the discharge end and the thin material hopper of dry separation all-in-one communicate mutually.
According to the utility model discloses an aspect, dry separation all-in-one includes the dry chamber and the separation chamber that communicate each other, the dry chamber uses the boiler to provide steam, top in the separator chamber is equipped with the screen cloth, be equipped with U-shaped groove separator between dry chamber and the separation chamber.
According to an aspect of the utility model, the end intercommunication of giving vent to anger of dust remover has the heat exchanger.
According to the utility model discloses an aspect, gas outlet means is including looping through SNCR reactor, one-level cyclone, second grade cyclone and the flue gas shaft that the pipeline is linked together, be equipped with SCR reactor and economizer in the flue gas shaft.
In accordance with one aspect of the present invention, the SNCR reactor employs a urea solution as a reducing agent.
The utility model discloses the advantage of implementing:
the utility model provides a novel biomass power plant's combustion system, novel biomass power plant's combustion system includes: boiler, be used for boiler feed inlet device and be used for the boiler device of giving vent to anger, feed inlet device includes: the feed belt, locate the hopper of feed belt below, locate hopper discharge end first auger delivery ware, locate the dry separation all-in-one of first auger delivery ware discharge end, give vent to anger the centrifugal separator of end intercommunication, with the dust remover of centrifugal separator discharge end intercommunication, thin material hopper and second auger delivery ware with dry separation all-in-one, the discharge end of second auger delivery ware is linked together with the furnace of boiler, the play dirt end of the discharge end of centrifugal separator and dust remover connects to thin material hopper, the feed end of second auger delivery ware and the discharge end and the thin material hopper of dry separation all-in-one communicate mutually. The effects of reducing the water content of the fuel, improving the combustion efficiency of the boiler and reducing the fan can be achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic external view of a feeding device of a combustion system of a novel biomass power plant according to the present invention;
fig. 2 is a schematic structural diagram of a combustion system boiler and a gas outlet device of a novel biomass power plant.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, a combustion system of a novel biomass power plant comprises: boiler 11, a feed arrangement for feeding boiler 11 and a gas outlet arrangement for discharging gas from boiler 11, the feed arrangement comprising: the feeding belt 1, locate hopper 2 of feeding belt 1 below, locate hopper 2 discharge end first auger delivery ware 3, locate the drying and separation all-in-one 4 of 3 discharge ends of first auger delivery ware, give vent to anger the centrifugal separator 8 of end intercommunication with drying and separation all-in-one 4, with dust remover 9, fine material hopper 2 and the second auger delivery ware 6 of 8 discharge ends of centrifugal separator intercommunication, the discharge end of second auger delivery ware 6 is linked together with the furnace of boiler 11, the discharge end of centrifugal separator 8 and the play dirt end of dust remover 9 connect to fine material hopper 7, the feed end of second auger delivery ware 6 and the discharge end and the fine material hopper 2 of drying and separation all-in-one 4 are linked together.
In this embodiment, drying and separating all-in-one 4 includes drying chamber and the separation chamber of intercommunication each other, drying chamber uses boiler 11 to provide steam, the top in the separation chamber is equipped with screen cloth 5, be equipped with U-shaped groove separator between drying chamber and the separation chamber.
In this embodiment, the air outlet end of the dust remover 9 is communicated with a heat exchanger 10.
In this embodiment, the gas outlet device includes an SNCR reactor 12, a primary cyclone separator 16, a secondary cyclone separator 13, and a flue gas shaft, which are sequentially communicated with each other through a pipeline, and an SCR reactor 14 and an economizer 15 are disposed in the flue gas shaft.
In this embodiment, the SNCR reactor 12 employs a urea solution as a reducing agent.
In order to solve the problems of the combustion system of the existing biomass boiler, the whole combustion system and equipment are optimized, and a system diagram after optimization is shown in figure 2. The method comprises the following steps that fuel enters a hopper through a belt, the fuel is conveyed into a drying and separating integrated machine through a primary screw feeder, a drying medium comes from hot primary air of a boiler, biomass fuel particles are in a fluidized state and are suspended and dried under the high pressure of the hot primary air, the biomass fuel particles are conveyed to flow by the hot primary air and enter a separating chamber after being roughly separated by a U-shaped groove separator, a sieve plate is arranged at the top of the separating chamber and can block slightly coarse particles, the biomass particles blocked by the U-shaped groove separator and the sieve plate fall into the separating chamber, a secondary screw feeder is arranged at the lower part of the separating chamber, and the dried biomass particles are conveyed into a hearth for combustion. The dust-containing gas passing through the sieve plate enters the inertial centrifugal separator, and then enters the dust remover for dust removal after being separated by the centrifugal separator, the clean gas at the outlet of the dust remover is high-temperature wet air containing moisture, a heat exchanger is arranged for heating demineralized water for recovering heat, condensed water generated after the wet air is cooled by the demineralized water is discharged into a nearby trench, and the gas is clean air and can be discharged on site. And the dust separated by the centrifugal separator and the dust remover automatically flows into the fine powder hopper through gravity, and when the material level reaches a normal material level, the outlet inserting plate door is opened and the dust is fed into the hearth for combustion through the secondary screw feeder. The sieve plate at the top of the drying separator is provided with a rotary blockage removing machine, and when the front-back pressure difference of the sieve plate reaches a protection value, the blockage removing machine is started to dredge the sieve pores, so that the separation efficiency is improved. The U-shaped groove separator is a conventional configuration in a separating device of a circulating fluidized bed boiler, and a blockage removing machine also belongs to a commonly used conventional technology, so that the U-shaped groove separator is not particularly described in the patent.
The biomass fuel particles are fully dried before entering the hearth, so that the fuel has low moisture and is easy to catch fire and burn out, the height of the hearth does not need to be too high, and a multi-process fluidized bed boiler does not need to be used to prolong the combustion time. In the high-temperature section of the hearth, an SNCR reaction device is arranged, and urea solution is used as a reducing agent. The primary cyclone separator of the boiler is provided with an external bed, a high-temperature heating surface is arranged in the external bed to save the arrangement space of the heating surface of the boiler, the flue gas passing through the primary cyclone separator enters the secondary cyclone separator, and the secondary cyclone separator is an adiabatic separator and mainly aims to remove most of dust in the flue gas and prevent alkali metal and dust in the flue gas from generating sparks at high temperature. The flue gas of the outlet of the secondary cyclone separator passes through the tail flue gas vertical shaft, an SCR reactor is arranged above the secondary economizer, a reducing agent nozzle is not arranged in the reactor, and redundant ammonia generated by high-temperature pyrolysis of urea solution sprayed by an upstream SNCR device is utilized to couple SCR and SNCR, so that the effect of improving the denitration efficiency is achieved.
And the flue gas passing through the SCR reactor passes through a low-temperature economizer, an air preheater, a dust remover, a draught fan and a desulfurization device, and is discharged into the atmosphere through a chimney.
The utility model discloses the advantage of implementing:
the utility model provides a novel biomass power plant's combustion system, novel biomass power plant's combustion system includes: boiler, be used for boiler feed inlet device and be used for the boiler device of giving vent to anger, feed inlet device includes: the feed belt, locate the hopper of feed belt below, locate the first auger delivery ware of hopper discharge end, locate the dry separation all-in-one of first auger delivery ware discharge end, give vent to anger the centrifugal separator of end intercommunication, with the dust remover of centrifugal separator discharge end intercommunication, thin material hopper and second auger delivery ware with dry separation all-in-one, the discharge end of second auger delivery ware is linked together with the furnace of boiler, the play dirt end of the discharge end of centrifugal separator and dust remover connects to thin material hopper, the feed end of second auger delivery ware and the discharge end and the thin material hopper of dry separation all-in-one communicate mutually. The effects of reducing the water content of the fuel, improving the combustion efficiency of the boiler and reducing the fan can be achieved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a novel biomass power plant's combustion system which characterized in that: the combustion system of the novel biomass power plant comprises: boiler, be used for boiler feed inlet device and be used for the boiler device of giving vent to anger, feed inlet device includes: the feed belt, locate the hopper of feed belt below, locate hopper discharge end first auger delivery ware, locate the dry separation all-in-one of first auger delivery ware discharge end, give vent to anger the centrifugal separator of end intercommunication, with the dust remover of centrifugal separator discharge end intercommunication, thin material hopper and second auger delivery ware with dry separation all-in-one, the discharge end of second auger delivery ware is linked together with the furnace of boiler, the play dirt end of the discharge end of centrifugal separator and dust remover connects to thin material hopper, the feed end of second auger delivery ware is linked together with the discharge end and the thin material hopper of dry separation all-in-one.
2. The combustion system of the novel biomass power plant as claimed in claim 1, wherein: the drying and separating integrated machine comprises a drying cavity and a separating cavity which are communicated with each other, the drying cavity provides hot air by using a boiler, a screen is arranged at the top in the separating cavity, and a U-shaped groove separator is arranged between the drying cavity and the separating cavity.
3. The combustion system of a novel biomass power plant according to claim 2, characterized in that: and the air outlet end of the dust remover is communicated with a heat exchanger.
4. The combustion system of a novel biomass power plant according to claim 3, characterized in that: the gas outlet device comprises an SNCR reactor, a primary cyclone separator, a secondary cyclone separator and a flue gas vertical shaft which are sequentially communicated through a pipeline, and an SCR reactor and an economizer are arranged in the flue gas vertical shaft.
5. The combustion system of a novel biomass power plant according to claim 4, characterized in that: the SNCR reactor employs a urea solution as a reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122963120.XU CN216744314U (en) | 2021-11-30 | 2021-11-30 | Novel combustion system of biomass power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122963120.XU CN216744314U (en) | 2021-11-30 | 2021-11-30 | Novel combustion system of biomass power plant |
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| CN216744314U true CN216744314U (en) | 2022-06-14 |
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| CN202122963120.XU Active CN216744314U (en) | 2021-11-30 | 2021-11-30 | Novel combustion system of biomass power plant |
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| CN (1) | CN216744314U (en) |
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2021
- 2021-11-30 CN CN202122963120.XU patent/CN216744314U/en active Active
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